Clean up Noto Sans UI stuff.

ui/base/font_helper_chromeos.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ui/base/font_helper_chromeos.h"
-
-#include "base/command_line.h"
-#include "ui/base/ui_base_switches.h"
-
-namespace ui {
-
-void ReplaceNotoSansWithRobotoIfEnabled(std::string* font_family) {
-  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kDisableRobotoFontUI)) {
-    static const char kNotoSansUI[] = "Noto Sans UI";
-    static const size_t kNotoSansUILen = arraysize(kNotoSansUI) - 1;
-    std::string::size_type noto_position = font_family->find(kNotoSansUI);
-    if (noto_position != std::string::npos)
-      font_family->replace(noto_position, kNotoSansUILen, "Roboto");
-  }
-}
-
-}  // namespace ui